### 1. Dab tsi yog Astm A795?
ASTM A795 yog tus qauv txheem tshwj xeeb rau ** Dub thiab kub - dipped galvanized steel yeeb nkab, npaj rau siv hauv hluav taws tiv thaiv kab ke **. Qhov no suav nrog cov tshuaj tsuag cov tshuaj tsuag, cov khoom muag, thiab lwm yam kev pabcuam cuam tshuam. The pipe is manufactured using welding (either electric-resistance weld or electric-fusion weld) and is not intended for pressure vessel service or for conveying steam. Nws lub hom phiaj tseem ceeb yog nyob rau qhov kev ntseeg siab thiab tus nqi {- Kev daws teeb meem kev nyab xeeb rau lub neej kev nyab xeeb.
### 2. Dab tsi yog qhov sib txawv ntawm Astm A53 thiab A795?
Lub ntsiab sib txawv nyob hauv lawv cov ntawv thov thiab cov kev ntsuas ntawm kev sim.
* ** ASTM A53 ** yog ib qho dav dav - lub hom phiaj txheem rau ** Dub thiab kub} dipped galvanized welded thiab seamless steel yeeb nkab **. Nws yog siv rau kev siv tshuab thiab kev siv siab, nrog rau kev xa pa cua, dej, chav dej, thiab roj. A53 cov kav dej yauv nyom ntau ntau cov kev ntsuam xyuas tshuab ntau dua, xws li Flattening thiab khoov cov ntawv, ua rau lawv haum rau cov qauv dav dav ntawm cov qauv thiab siab siv.
* ** ASTM A795 ** yog tus qauv tshwj xeeb ** tshwj xeeb rau cov tshuab tiv thaiv hluav taws **. Thaum nws qhia cov txheej txheem sib xws nrog welded A53 cov yeeb nkab, nws cov kev xeem yog txiav rau nws rooj plaub tshwj xeeb. Nws yog feem ntau tsis pom zoo rau kev dav dav- lub hom phiaj siab cov ntawv thov sab nraud tiv thaiv hluav taws kub.
Hauv ntej, A53 yog ib qho ntau, dav}} lub hom phiaj hluav taws xob thiab thaum A795 yog cov yeeb nkab ntau tsim tshwj xeeb rau hluav taws sprinkler cov tshuab hluav taws.
### 3. Dab tsi yog qhov sib txawv ntawm Astm A135 thiab A795?
Qhov sib txawv tseem ceeb kuj yog lawv cov ntawv thov npaj thiab hom Weld lawv feem ntau siv.
* ** ASTM A135 ** yog tus qauv rau ** hluav taws xob {{}}}}} tsis welded (ERW) steel yeeb nkab "siv rau cov laj thawj steel). Nws tuaj yeem siv rau cov huab cua sib txuas, dej, thiab nws yog ** tsis yog ** rau kev pabcuam rau lub siab siab lossis khoov lossis khoov lossis khoov. Nws yog qhov yooj yim, nqi hluav taws xob - cov yeeb nkab qib.
* ** ASTM A795 ** yog, dua, tshwj xeeb rau hnub tua hluav taws kub **. Thaum A795 tuaj yeem siv cov txheej txheem ERW (zoo li A135), nws kuj tseem tuaj yeem siv hluav taws xob {}} fusion weld. Qhov tseem ceeb tshaj plaws distintertion yog tias A795 yog tsim thiab pov thawj kom tau raws li kev ua tau zoo thiab kev nyab xeeb ceeb toom rau hluav taws sprinkler piping, uas A135 tsis yog.
Qhov tseem ceeb, A135 yog ib qho yooj yim erw yeeb nkab rau tsis -}} kev nyab xeeb rau lub neej (hluav taws kub tiv thaiv) cov ntawv thov.
### 4. Dab tsi yog astm rau teem sijhawm 40 steel yeeb nkab?
Tsis muaj ib qho tib neeg ASTM cov qauv tshwj xeeb rau "Cov Sij Hawm 40" Yeeb Nkab Hlau. ** SCHOMM 40 ** yog ib lub phab ntsa tuab tsim sau tseg los ntawm ASME B36.10 tus qauv rau kev ua si tsawg. Ib cov yeeb nkab nrog ib lub sijhawm 40 tuab yuav tsim rau ntau yam qauv ASTM cov qauv, nyob ntawm seb nws siv tau.
Cov Qauv ASTM nyob rau hauv uas sij hawm 40 yeeb nkab yog tsim muaj nyob suav nrog:
* ** ASTM A53 ** (Qeb A lossis B): Rau General-} lub hom phiaj thiab siab daim ntawv thov.
* ** ASTM A106 ** (Qeb A lossis B): Rau siab- kev pabcuam kub (seamless tsuas).
* ** ASTM A135 **: Rau cov yeeb nkab hluav taws xob.
* ** ASTM A795 **: Rau cov hluav taws tiv thaiv hluav taws.
Yog li ntawd, koj yuav tsum qhia ob qho qauv seem (sij hawm 40) thiab cov qauv txheej txheem (piv txwv li, A53) kom tiav cov yeeb nkab.
### 5. Dab tsi yog qhov tsawg kawg plawv uas tso cai rau teem sijhawm 40 cov kab ke uas ua raws ASTM A53 qib B?
Qhov tsawg kawg ntawm txoj kab rau ib lub sijhawm 40 yeeb nkab kem ua los ntawm AQUM A53 qib B tsis raug cai los ntawm cov khoom siv ASTM kev qhia tshwj xeeb. Lub ASTM A53 qauv txhais cov tshuaj thiab cov khoom siv mechanies ntawm cov hlau, tsis yog nws siv ua ib kem txheej txheem.
Pab Uas Ntaus Thawj rau Qhov Qhov Ntawm Qhov tsawg kawg yog tus qauv tsim qauv **, xws li AISC (as-amer American Tus tsim qauv tsim nyog yuav tsum xam cov taub no xav tau raws li kev thov thauj khoom, lub sijhawm tsis muaj qhov ntev ntawm cov lej.
Txawm li cas los xij, rau cov tswv yim tsim thiab kev tsim kho ib txwm siv, siv tau thiab dav tau txais qhov tsawg kawg nkaus rau cov qauv yeeb nkab cov qauv yeeb nkab yog ** 2 nti **. Ib 2 - nti sij hawm 40 yeeb nkab B muaj cov txheej txheem sab nraud Ib txwm sab laj tus kws ua haujlwm tsim nyog los txiav txim qhov loj me rau koj txoj haujlwm tshwj xeeb.
